68conv455

Does a tic-toc-tach have provision to switch from a 6 cylinder to an 8 cylinder engine. I bought my 68 cutlass with a 6 cyl, now it has an 8 cyl. Do I need to do something with the tach to make it read correctly?

68conv455

Don't tell me I've stumped you.
My tach reads 1800 RPM and my Engine Analizer reads 1200 RPM.
I know this doesn't match up perfect, but I'm guessing that the Tic-Toc-Tach should read 1600 if I ratio it out to the number of cylinders.
Anyone know about this? Can I get this modified somewhere?

stevengerard

I don't know about 6 cyl to 8 cyl but if you search the threads here there is information on how to calibrate the tach which may help

svnt442

That is only a little. I don't think that will convert it from 6 to 8 cyl.
It would require a different resistor I'm sure, but I wouldn't know which one or what value to replace it with.

68conv455

Can anyone recommend a gauge shop to send it to?

68conv455

Ttt

1969w3155

Bob's speedometer repair in Howell Mi. He's listed in Hemmings.

1969w3155

http://www.bobsspeedometer.com/1/120/index.asp

Eightupman

http://www.bobsgauges.com/servlet/th...Cutlass/Detail

Its only $1200. I'd buy a repop first. Same concept as what Bob does.

Bluevista

Rob would know how, he could build one from scratch out of a brick and a paper clip.
Where are you Rob?